<template>
    <div class="dv-scroll-ranking-board" :ref="ref">
      <div
        class="row-item"
        v-for="(item, i) in rows"
        :key="item.toString() + item.scroll"
        :style="`height: ${heights[i]}px;`"
        @click="lineClick(item)" style="cursor: pointer"
      >
        <div class="ranking-info">
          <div class="rank">No.{{ item.ranking }}</div>
          <div class="info-name" v-html="item.name" />
          <div class="ranking-value">{{ item.value + mergedConfig.unit }}</div>
        </div>
  
        <div class="ranking-column">
          <div
            class="inside-column"
            :style="`width: ${item.percent}%;`"
          >
            <div class="shine" />
          </div>
        </div>
      </div>
    </div>
  </template>
  
  <script>
  import autoResize from '@jiaminghi/data-view/lib/mixin/autoResize'
  
  import { deepMerge } from '@jiaminghi/charts/lib/util/index'
  
  import { deepClone } from '@jiaminghi/c-render/lib/plugin/util'
  
  export default {
    name: 'DvScrollRankingBoard',
    mixins: [autoResize],
    props: {
      config: {
        type: Object,
        default: () => ({})
      }
    },
    data () {
      return {
        ref: 'scroll-ranking-board',
  
        defaultConfig: {
          /**
           * @description Board data
           * @type {Array<Object>}
           * @default data = []
           */
          data: [],
          /**
           * @description Row num
           * @type {Number}
           * @default rowNum = 5
           */
          rowNum: 5,
          /**
           * @description Scroll wait time
           * @type {Number}
           * @default waitTime = 2000
           */
          waitTime: 2000,
          /**
           * @description Carousel type
           * @type {String}
           * @default carousel = 'single'
           * @example carousel = 'single' | 'page'
           */
          carousel: 'single',
          /**
           * @description Value unit
           * @type {String}
           * @default unit = ''
           * @example unit = 'ton'
           */
          unit: '',
          /**
           * @description Auto sort by value
           * @type {Boolean}
           * @default sort = true
           */
          sort: true
        },
  
        mergedConfig: null,
  
        rowsData: [],
  
        rows: [],
  
        heights: [],
  
        animationIndex: 0,
  
        animationHandler: '',
  
        updater: 0
      }
    },
    watch: {
      config () {
        const { stopAnimation, calcData } = this
  
        stopAnimation()
  
        calcData()
      }
    },
    methods: {
      lineClick(item){
        this.$emit('lineClick',item)
      },
      afterAutoResizeMixinInit () {
        const { calcData } = this
  
        calcData()
      },
      onResize () {
        const { mergedConfig, calcHeights } = this
  
        if (!mergedConfig) return
  
        calcHeights(true)
      },
      calcData () {
        const { mergeConfig, calcRowsData } = this
  
        mergeConfig()
  
        calcRowsData()
  
        const { calcHeights } = this
  
        calcHeights()
  
        const { animation } = this
  
        animation(true)
      },
      mergeConfig () {
        let { config, defaultConfig } = this
  
        this.mergedConfig = deepMerge(deepClone(defaultConfig, true), config || {})
      },
      calcRowsData () {
        let { data, rowNum, sort } = this.mergedConfig
  
        sort && data.sort(({ value: a }, { value: b }) => {
          if (a > b) return -1
          if (a < b) return 1
          if (a === b) return 0
        })
  
        const value = data.map(({ value }) => value)
  
        const max = Math.max(...value) || 0
  
        data = data.map((row, i) => ({ ...row, ranking: i + 1, percent: row.value / max * 100 }))
  
        const rowLength = data.length
  
        if (rowLength > rowNum && rowLength < 2 * rowNum) {
          data = [...data, ...data]
        }
  
        data = data.map((d, i) => ({ ...d, scroll: i }))
  
        this.rowsData = data
        this.rows = data
      },
      calcHeights (onresize = false) {
        const { height, mergedConfig } = this
  
        const { rowNum, data } = mergedConfig
  
        const avgHeight = height / rowNum
  
        this.avgHeight = avgHeight
  
        if (!onresize) this.heights = new Array(data.length).fill(avgHeight)
      },
      async animation (start = false) {
        let { avgHeight, animationIndex, mergedConfig, rowsData, animation, updater } = this
  
        const { waitTime, carousel, rowNum } = mergedConfig
  
        const rowLength = rowsData.length
  
        if (rowNum >= rowLength) return
  
        if (start) {
          await new Promise(resolve => setTimeout(resolve, waitTime))
          if (updater !== this.updater) return
        }
  
        const animationNum = carousel === 'single' ? 1 : rowNum
  
        let rows = rowsData.slice(animationIndex)
        rows.push(...rowsData.slice(0, animationIndex))
  
        this.rows = rows
        this.heights = new Array(rowLength).fill(avgHeight)
  
        await new Promise(resolve => setTimeout(resolve, 300))
        if (updater !== this.updater) return
  
        this.heights.splice(0, animationNum, ...new Array(animationNum).fill(0))
  
        animationIndex += animationNum
  
        const back = animationIndex - rowLength
        if (back >= 0) animationIndex = back
  
        this.animationIndex = animationIndex
        this.animationHandler = setTimeout(animation, waitTime - 300)
      },
      stopAnimation () {
        const { animationHandler, updater } = this
  
        this.updater = (updater + 1) % 999999
  
        if (!animationHandler) return
  
        clearTimeout(animationHandler)
      }
    },
    destroyed () {
      const { stopAnimation } = this
  
      stopAnimation()
    }
  }
  </script>
  
<style lang="scss" scoped>
.dv-scroll-ranking-board {
  width: 100%;
  height: 100%;
  color: #fff;
  overflow: hidden;
}
.dv-scroll-ranking-board .row-item {
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}
.dv-scroll-ranking-board .ranking-info {
  display: flex;
  width: 100%;
  font-size: 13px;
}
.dv-scroll-ranking-board .ranking-info .rank {
  width: 40px;
  color: #1370fb;
}
.dv-scroll-ranking-board .ranking-info .info-name {
  flex: 1;
}
.dv-scroll-ranking-board .ranking-column {
  border-bottom: 2px solid rgba(19, 112, 251, 0.5);
  margin-top: 5px;
}
.dv-scroll-ranking-board .ranking-column .inside-column {
  position: relative;
  height: 6px;
  background-color: #1370fb;
  margin-bottom: 2px;
  border-radius: 1px;
  overflow: hidden;
}
.dv-scroll-ranking-board .ranking-column .shine {
  position: absolute;
  left: 0%;
  top: 2px;
  height: 2px;
  width: 50px;
  transform: translateX(-100%);
  background: radial-gradient(#28f8ff 5%, transparent 80%);
  animation: shine 3s ease-in-out infinite alternate;
}
@keyframes shine {
  80% {
    left: 0%;
    transform: translateX(-100%);
  }
  100% {
    left: 100%;
    transform: translateX(0%);
  }
}

</style>